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In a lunar eclipse, is the moon between the sun and earth or is earth between the sun and the moon?

By Sandy Parks · On April 1, 2019

Send your answers to cruisingcompass@bwsailing.com. A winner will be selected randomly from the correct answers and will win a one-year subscription to the digital version of Blue Water Sailing magazine.

 

Congratulations to Samantha Simonds of Southampton, England who correctly explained a boat’s sail-area-to-displacement ratio. “The SA/D offers a good estimate of a boat’s sailing performance. A high SA/D, say over 20, indicates a lot of sail area for a given displacement and higher sailing performance. Most cruising boats have an SA/D of around 15. It’s important to remember that the SA in the ratio is “working sail” and that’s the 100 percent fore triangle and mainsail, not the area of an overlapping genoa.”

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Sandy Parks

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